The Treasure Island Hotel in Las Vegas was the most unaccomodating hotel as far as providing gluten-free meals. I had contacted the executive chef as well as the beverage manager before hand. They could not go to Trader Joe's less than 3 miles away to get gluten-free waffles and pancakes. In fact, the chef asked me to educate him on what is gluten.
The Bellagio on the other hand bought gluten-free mixes at Trader Joe's and Whole Foods and provided a delicious breakfast for me. In the future, I would spend more money to stay closer to the Bellagio than at Treasure Island.